Nowadays, in all industries, the aim is to obtain products with excellent properties with a small mass. Thus, polymer composites are increasingly used, but scientists and manufacturers face many challenges when processing and obtaining satisfactory products with great properties, as well as the recycling and disposing of waste after the expiration date of the product. With this Special Issue, entitled "Polymer Composites: Structure, Properties and Processing", we aimed to collate papers relating to the subject of this Special Issue that attempted to solve some of the problems related with it. We hope that readers will find some high-quality solutions that will help them in their future work.
